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                                    <tr><td valign="top" height="24" style="font-size:13px;color:#666;font-family:Helvetica,Arial,SimSun,sans-serif;">用户，你好！</td></tr>
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                                    <tr><td valign="top" height="24" style="font-size:13px;color:#666;font-family:Helvetica,Arial,SimSun,sans-serif;">这里是邮件内容</td></tr>
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                                    <tr><td valign="middle" height="24" style="font-size:13px;color:#b6b6b6;font-family:Helvetica,Arial,SimSun,sans-serif;">本邮件由系统自动发出，请勿回复。</td></tr>
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